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A method of producing oil and gas

A technology of oil and gas and tubing, which is applied in the field of oil and gas field exploitation. It can solve the problems of affecting the economic benefits of oil and gas fields, reducing the production efficiency of oil and gas wells, and increasing operating costs, so as to achieve the effect of reducing operation risks, reducing operation time and operating costs, and reducing pollution.

Active Publication Date: 2020-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can continue to extract oil and gas, the methods of pumping or increasing formation pressure increase the operating cost and reduce the production efficiency of oil and gas wells, which will ultimately affect the economic benefits of the entire oil and gas field development

Method used

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  • A method of producing oil and gas
  • A method of producing oil and gas
  • A method of producing oil and gas

Examples

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no. 2 example

[0083] Such as Figure 6 As shown, it is a schematic structural diagram according to the second embodiment of the present invention. The second embodiment differs from the first embodiment only in the opening mechanism. In the second embodiment, the opening mechanism mainly comprises a wedge plug 14a and a wedge plug shear pin 13a. The tapered surface of the wedge plug 14a interferes with the inner tapered surface of the lower joint 12 and is positioned by the wedge plug shear pin 13a. The area of ​​the upper end surface of the wedge plug 14a is small and the area of ​​the lower end surface is large, and the lower end surface is subjected to formation pressure The wedge-shaped plug 14a will not accidentally break away from the mandrel 1.

[0084] Preferably, the wedge plug 14a is made of rubber-like material that can withstand high pressure and seal.

no. 3 example

[0086] Such as Figure 7 and Figure 7A As shown, it is a structural schematic diagram of the third embodiment and a structural schematic diagram of a spliced ​​wedge plug according to the present invention. The third embodiment differs from the second embodiment only in the opening mechanism. In the third embodiment, the opening mechanism mainly includes two spliced ​​wedge plugs 14b and two wedge plug shear pins 13b. The tapered surfaces of the spliced ​​two wedge-shaped plugs 14b interfere with the inner tapered surfaces of the lower joint 12 and are positioned by the wedge-shaped plug shear pins 13a. The wedge-shaped plug 14b will not accidentally break away from the mandrel 1 due to formation pressure.

[0087] In the process of running into the tubing 200, the wedge plug shear pin 13a is sheared by applying pressure to the tubing 200, and the wedge plug 14b is driven into the bottom of the well against the frictional force of the interference fit. The advantage of us...

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Abstract

The invention provides an oil gas extracting method. The method comprises the following steps: 1) judging well yield; 2) plugging an original production tube column of the well when the yield reduces to a preset value; 3) putting an oil pipe with a diameter less than that of the original production tube column into the original production tube column; and 4) enabling the bottom of the well to be communicated with the oil pipe and used as the production tube column, thereby spraying the oil gas through the production tube column. According to the method, the oil pipe with smaller diameter is inserted into the original production tube column, so as to form a new production tube column, keep the gas-liquid flow rate higher than the critical liquid carrying flow rate and guarantee the self-spraying production of the oil gas well. Besides, before the oil pipe is inserted, the original production tube column is plugged, the wellhead pressure is reduced to normal pressure, the oil pipe with smaller diameter can realize the insertion without pressure and the operation is safe and smooth.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploitation, in particular to an oil and gas extraction method. Background technique [0002] For oil and gas wells in most oil and gas fields, at the initial stage of production, the formation pressure is high, and the oil and gas production is high. The flow velocity of gas and liquid at the bottom of the production well and in the wellbore exceeds the critical liquid-carrying velocity, and the liquid will be completely absorbed by the gas flow at this time. Carried to the ground, there is no or less fluid accumulation at the bottom of the well, and the oil and gas well can maintain self-flowing production. [0003] In the middle and later stages of production, as the production time prolongs, the formation pressure gradually decreases. Under the condition that the original production string remains unchanged, the oil and gas production will also decrease accordingly, and the flow rat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16
CPCE21B43/16
Inventor 石在虹崔斌柯文奇计秉玉苏建政刘尧文李颖牛骏李孟涛刘乔平
Owner CHINA PETROLEUM & CHEM CORP